Simplify namespace code in thread_profiler.cc

Bug: 851163
Change-Id: Ic533e231e5b4f7b2d6f5df06a05cd0433efc304d
Reviewed-on: https://chromium-review.googlesource.com/1114239
Reviewed-by: Mike Wittman <wittman@chromium.org>
Commit-Queue: Xi Cheng <chengx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570258}
1 file changed